Chapter U5.8, Problem 1E

Interpretation Introduction

Interpretation: The relation of calories with combustion needs to be explained.

Concept introduction: Combustion is a chemical reaction where a compound or an element undergoes reaction with oxygen and releases energy in the form of light and heat. Combustion of covalent compounds comprising carbon and hydrogen produces carbon dioxide and water. The combustion of metallic substance produces metal oxide.

Answer to Problem 1E

Combustion reaction of oxygen and food produces energy in our body which is measured as food calorie.

Explanation of Solution

Calorie is a unit of energy. Food calorie means the amount of energy we get from our food. To measure food calorie, the amount of energy released when food reacts with oxygen, that is, combustion reaction needs to be calculated. To determine the amount of heat transfer during a combustion reaction is to use the reaction between the fuel and the oxygen to heat a measured amount of some other substance.

Conclusion

Foods are sources of energy. Burning of food, that is, combustion reaction generates energy.